Spam Check privacy policy
Updated November 6, 2026.
Spam Check is a browser extension that labels mail in Gmail and Outlook on the web. It runs on your device. It does not send your mail to a server, and it has no account of its own.
What it can see
On mail.google.com, outlook.live.com, outlook.office.com, and outlook.office365.com, the extension reads the sender name, sender address, subject, and the short inbox preview of messages that are already on the screen. It uses that text to decide whether to show SPAM, QUESTIONABLE, or RAISES CONCERN.
It does not run on other websites. It does not read your contacts, your password, or mail that is not shown in the inbox row it is checking.
What it stores
The extension stores a small memory in the browser with chrome.storage.local, and only on that device:
Senders and message fingerprints it has already classified as spam, so a repeat can be labeled or moved to Trash.
Senders you mark as clean, so later mail from them is left unlabeled unless a new message is spam on its own.
That memory is not sold, not used for advertising, and not transmitted to the developer. Removing the extension deletes it.
Trash
When the same sender or the same spam message has already been spam three times, Spam Check uses Gmail or Outlook’s own Delete control to move that message to Trash. It does not permanently delete mail.
Contact
Questions about this policy can go to the support email on the Chrome Web Store listing for Spam Check.